Muffler.



H. H. LARKINS.

MUFFLER.

APPLIOATION FILED SEPT. z, 1911.

1,021,254. Patented Mar. 26, 1912.

E: C-n ML2@ HLHVZ'MSV l' UNITED sTATEs PATENT oEEIoE.

HERMAN H. LARKINs, or PRINCETON, KENTUCKY.

MUFFLER.

To all whom t may concern."

Be it known that I, HERMAN H. LARKINS, a citizen of the United States, residing at Princeton, in the county of Caldwell and State of Kentucky, have invented certain' new and useful Improvements in Mufliers, of which the following is a specification, refer-V ence being had to the accompanying drawings.

This invention relates to new and useful improvements in muilers and has for its object to provide a new and improved mutlier s'o arranged as to effectively muiile or deaden the exhaust ofexplosive engines, or other engines and machines without causing any back pressure in the engine cylinder.

Another object of the invention is to provide a device of this character which will possessfadvantages inv points of efficiency, durability, is inexpensive of manufacture and at the same time is simple in construction and operation.

l With the above and other objects in view the invention consists in the novel features of construction and the combination. and arrangement of parts hereinafter described and pointed out in the claims and shown in the accompanying drawings in which- Figure 1 is a side elevation of my'improved muiiler; Fig. 2 is a longitudinal sectional view; Fig. 3 is a sectional view -on the line 3-3 of Fig. 2, Fig/1 is a longitudinal sectional view of a. modified form.

Referring more particularly to the drawings 1 indicates an exhaust pipe to carry the products of combustion from the combustion chamber of the cylinder of an internal-combustion engine. The extremity of the exhaust pipe is led into a muilier drum or.

chamber 2. The exhaust pipe 1 is disposed in the drum over half way so as to bring the exhaust well into the, chamber 2 where it circulates and then passes out through the conductor 3 into the second orv additional muiiler drum 4. vThis conductor 3 is disposed into the second drum over half way so as to bring the exhaust well into the drum 4. where it circulates back to the other end of the drum and passes out through the discharge pipe 5, communicating with the atmosphere at its outer end. Jam nuts 6 are arranged upon the conductor 3 and disposed between the drums to keep them in position at an equal distance apart and also to kee the conductor up in position. Jam nuts are arranged on the outer end of the pipes Specification of Letters `Patent.

parts may be found to be suiicient, and in other cases it will readily beseen that-the discharge pipe 5 might lead into an additional muffler drum constructed and \ar ranged with parts corresponding to the drum 4. My invention thereforeA contemplates as coming within its scope the employment of either a single mutlier drum.

with its connecting parts or any desired mul- Patented- Mar. 26, 1912.. Application iled September 2, 1911. Serial N o. 647,311.

tiple of drums connected up in a similar manner to that illustrated in the accompanying drawings.

It will be perceived when the products of combustion are discharged into the drum 2 from the exhaust pipe 1 there is no appreciable back pressure. The gases discharged into the muiller drum it will be readily seen pass through the drum in a roundabout Way, byv/rst being discharged through the drum to one end and then circulating back to the other end where it enters t-he conductor 3 and passes out into the drum 4, Where it is circulated as in lthe lirst drum and then passes oli' to the atmosphere. y

YIn Fig. 4 is shown a slightly modified form of muffier wherein 8 indicates an exhaust pipe which communicates with the muffler drum 9 at one side and near one end thereof. lThe exhaust passes in the drum at one end and circulates to the other end where it enters a conductor 10 which carries it to the farther' end of a second' muliier drum 11'/ and from there circulates back to the other end of the drum and is discharged through the pipe 12 located in the side of the drum nea-r one end thereof. This form of muiiler is 'to be used in place of the first form when it is so desired.

While I have shown and described the preferred .form of my invention it will be esI obvious that various 'changes in the details l of construction and in the proportions may be resorted to vfor successfully carrying the invention into practice without sacrificing any of the novel features or departing from the principles thereof. y

Having thus described my invention, I claim 1. A muffler comprising spaced drums arranged in longitudinal alinement, a conducting pipe extending through the opposed ends of the drums and into the same beyond their longitudinal centers, nuts threaded upon the intermediate portion of said pipe and engaging the drum heads to maintain the drumsV in spaced relation, an exhaust pipe connected to one of the drums, and a discharge pipe connected to the other drum.

2. A muffler comprising a plurality of drums arranged in longitudinal alinement y and in vspaced relation, a conducting pipe connecting adjacent drums and extending through the opposed end Walls thereof and into the respective drums beyond their longitudinal centers, nuts threaded upon the intermediate portion of the conducting pipe and engaging the drum heads to maintain the drums in spacedrelation, an exhaust pipe extending' through the opposite end Wall of one of the drum's and in parallel relation to the conducting pipe, and a: discharge pipe'extending into the other drum in longitudinal alinement With said exhaust pipe, said exhaust anddischarge pipes extending beyond the ends of the conducting pipe and terminating at points adjacent the connected ends of the respective drums.

3. A muier comprising a plurality ofdrums arranged in longitudinal alinement, a conducting pi-pe eccentrically disposed through the opposed end Walls of adjacent drums, said pipe extending into the respective drums beyond their longitudinal centers, nuts threaded upon the intermediate portion of said pipe to engage the opposed end Walls of the drums to maintain the drums in spaced' relation, an exhaust pipe concentrically disposed through, the other end Wall of one of' the drums, a discharge pipe concentrically disposed through the corresponding end Wall of the other drum, said exhaust and discharge pipes overlapping the conducting pipes and terminating Within their respective drums at points adjacent to the connected ends thereof.

In testimony whereof I hereunto affix my signature in the presence of two Witnesses.

HERMAN H. LARKINS.

Witnesses:

THEO. LARKINS, Jos. MORRISON. 

